Google Knowledge Graph: Entity isReference Domains
Proprietary analysis of Google's entity validation patterns across the Knowledge Graph.
⚠️ You Can't Use Just ANY Domain!
Out of 1,738,093 domains we monitor, only 62,202 qualify as isReference domains.
3.65%
Only 3.65% of domains earn isReference status from Google. Domain selection is critical.
Wikipedia is NOT Required (or even your best bet)
Wikipedia: 6 million entities
Kalicube Pro: 71 million entities
Knowledge Graph: 50 billion entities
0.012%
Wikipedia covers only 0.012% of the Knowledge Graph. If your entity isn't in that 0.012%, you need to build a Knowledge Panel with ~30 isReference url instead.
📊 Kalicube's Entity Validation Dataset
💡 Even Small Niche Domains Have isReference Authority
Examples from our dataset (December 2025):
| kalicube.com | 21 entities |
| searchengineland.com | 11 entities |
| jasonbarnard.com | 86 entities |
| searchenginejournal.com | 270 entities |
| entrepreneur.com | 1,292 entities |
| forbes.com | 2,823 entities |
Your niche-specific domains may have similar authority in your category.
Top 100 isReference Domains for All Entity Types
| Rank | Domain | Entity Count |
|---|---|---|
| 1 | wikipedia.org | 1,121,289 |
| 2 | twitter.com | 151,967 |
| 3 | instagram.com | 133,257 |
| 4 | linkedin.com | 128,624 |
| 5 | x.com | 104,062 |
| 6 | allocine.fr | 101,740 |
| 7 | amazon.com | 64,754 |
| 8 | facebook.com | 62,920 |
| 9 | deezer.com | 55,938 |
| 10 | namu.wiki | 38,721 |
| 11 | youtube.com | 36,117 |
| 12 | google.com | 33,263 |
| 13 | legacy.com | 28,895 |
| 14 | britannica.com | 21,238 |
| 15 | reddit.com | 17,767 |
| 16 | dictionary.com | 15,856 |
| 17 | wiktionary.org | 13,801 |
| 18 | microsoft.com | 13,365 |
| 19 | trustpilot.com | 12,717 |
| 20 | fandom.com | 12,135 |
| 21 | isfdb.org | 11,161 |
| 22 | yahoo.com | 10,175 |
| 23 | crunchbase.com | 9,338 |
| 24 | tiktok.com | 9,179 |
| 25 | metacritic.com | 9,121 |
| 26 | rottentomatoes.com | 8,712 |
| 27 | letterboxd.com | 7,879 |
| 28 | gutenberg.org | 7,668 |
| 29 | espn.com | 7,414 |
| 30 | github.com | 7,009 |
| 31 | fifa.com | 6,646 |
| 32 | justwatch.com | 6,649 |
| 33 | apple.com | 6,556 |
| 34 | uk.com | 6,540 |
| 35 | history.com | 5,920 |
| 36 | quora.com | 5,592 |
| 37 | shopee.co.id | 5,410 |
| 38 | cambridge.org | 5,260 |
| 39 | wikia.com | 5,249 |
| 40 | hbomax.com | 5,154 |
| 41 | wikiwand.com | 5,056 |
| 42 | spotify.com | 5,029 |
| 43 | epicgames.com | 4,877 |
| 44 | bbc.co.uk | 4,724 |
| 45 | webuy.com | 4,606 |
| 46 | billboard.com | 4,526 |
| 47 | plus.lefigaro.fr | 4,526 |
| 48 | premiere.fr | 4,485 |
| 49 | time.is | 4,443 |
| 50 | theguardian.com | 4,433 |
| 51 | pinterest.com | 4,425 |
| 52 | forbes.com | 4,350 |
| 53 | imdb.com | 4,342 |
| 54 | shopee.ph | 4,280 |
| 55 | nfl.com | 3,950 |
| 56 | vocabulary.com | 3,787 |
| 57 | nhl.com | 3,773 |
| 58 | bbc.com | 3,767 |
| 59 | ign.com | 3,756 |
| 60 | bloomberg.com | 3,700 |
| 61 | hotels.com | 3,584 |
| 62 | bing.com | 3,542 |
| 63 | ca.gov | 3,367 |
| 64 | google.co.il | 3,357 |
| 65 | reuters.com | 3,318 |
| 66 | independent.co.uk | 3,299 |
| 67 | dell.com | 3,225 |
| 68 | google.com.br | 3,140 |
| 69 | indeed.com | 3,133 |
| 70 | genius.com | 3,054 |
| 71 | pornhub.com | 3,041 |
| 72 | dictionary.net | 2,962 |
| 73 | soundcloud.com | 2,961 |
| 74 | famousbirthdays.com | 2,955 |
| 75 | itv.com | 2,935 |
| 76 | house.gov | 2,852 |
| 77 | netflix.com | 2,809 |
| 78 | nytimes.com | 2,773 |
| 79 | nih.gov | 2,668 |
| 80 | playstation.com | 2,669 |
| 81 | vikidia.org | 2,612 |
| 82 | radiofrance.fr | 2,602 |
| 83 | washington.edu | 2,572 |
| 84 | thesaurus.com | 2,493 |
| 85 | france24.com | 2,480 |
| 86 | search.google | 2,425 |
| 87 | chess.com | 2,368 |
| 88 | eo-paris.fr | 2,368 |
| 89 | nintendo.com | 2,326 |
| 90 | the-independent.com | 2,297 |
| 91 | rateyourmusic.com | 2,279 |
| 92 | nasa.gov | 2,220 |
| 93 | gov.uk | 2,208 |
| 94 | mit.edu | 2,204 |
| 95 | gog.com | 2,187 |
| 96 | kpmg.com | 2,146 |
| 97 | loc.gov | 2,142 |
| 98 | office.com | 2,107 |
| 99 | nps.gov | 2,071 |
| 100 | watch.plex.tv | 2,072 |
| 101+ | 62,102 additional niche-specific domains in full dataset covering 70,197,881 additional entities | |
Why This Data Matters
Google validates entity information through patterns of corroborating mentions across trusted domains. This list shows where Google recognizes all entity types - but here's the catch: entity authority is extremely niche-specific.
Entity Validation at Scale
Google's Knowledge Graph requires consistent entity recognition across validated domains.
- Only 3.65% of domains (62202 out of 1738093) qualify as isReference
- Brands typically need ~30 entity-validated url for a stable Knowledge Panel
- Each niche has unique entity authority patterns
- Generic "authority lists" miss 95%+ of niche-specific opportunities
⚠️ This Free List is Intentionally Limited
The top 100 domains shown above are dominated by massive generalist sites. For 99% of brands, the real opportunities lie in the niche-specific domains that only appear in our full platform dataset.
Recommended Reading:
- How to Get Your Brand in Google's Knowledge Graph Without a Wikipedia Page
- isReference - the key to corporate publisher and person content creator optimization
🔐 Find YOUR Niche-Specific isReference Domains
We monitor 23M+ URLs across 1.7M domains to identify the exclusive 3.65% that qualify as isReference domains for 72M+ entities. The Kalicube Pro platform maps your competitive landscape and identifies your niche-specific opportunities in 15 minutes.
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